<template>
  <div>
    <span>全选:</span>
    <input v-model="isAll" type="checkbox" />
    <button>反选</button>
    <ul>
      <li v-for="(item,index) in arr" :key="index">
        <input v-model="item.c" type="checkbox" />
        <span>{{ item.name }}</span>
      </li>
    </ul>
  </div>
</template>

<script>
export default {
  name: "VuBaseApp",

  data() {
    return {
      arr: [
        {
          name: "猪八戒",
          c: false,
        },
        {
          name: "孙悟空",
          c: false,
        },
        {
          name: "唐僧",
          c: false,
        },
        {
          name: "白龙马",
          c: false,
        },
      ],
    };
  },
  computed:{
      isAll:{
          set(val){
              this.arr.forEach(item=>item.c=val)
          },
          get(){
              return this.arr.every((item)=>item.c)
          }
      }
  },

  mounted() {},

  methods: {},
};
</script>

<style lang="scss" scoped>
</style>